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How do you bend a sheet a drywall into a curve? I tried wetting the back surface with a paint roller, letting it soak for 30 minutes, then scoring the back paper in parallel lines about an inch apart where I wanted the curve. When I screwed it to the studs, though, one of the scores turned into a break and the sheet became angled rather than curved.

In this specific situation the curve was probably about 10 degrees over the span of 6 inches. Is this too tight a bend for standard drywall?

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4  
score first, damp second. May take a little practice, but should work fine. –  shirlock homes Jan 30 '11 at 15:41
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2 Answers

up vote 11 down vote accepted

Dampening and scoring the back paper is the right way to prepare drywall for installation around a curve. A quick back-of-the-envelope calculation says that the radius of curvature was about 30", which should have been OK (my drywall book says 20" minimum for 1/2" panels). You may simply have been unlucky with it breaking.

There are flexible drywall panels, though I've never seen them in the stores. Failing that, you could also try a double thickness of 1/4" panels, which are widely available.

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On one very large job with a 3 story round staircase, my guys actually threw full sheets of rock into the lake out front for a couple of minutes to bend it around the walls!!! Sure looked insane, but worked. –  shirlock homes Jan 30 '11 at 20:45
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seems like that would be a good way to make a new house smell old. –  levi rosol Jan 31 '11 at 15:51
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If it is too tight to bend the drywall, then you could try our company's products:

Fulcrum Composites Website

We are a small company who make custom curved sandwich panels. Their primary application is for decorative architectural features in museums, churches and the like. We were recently asked by a local architect to produce panels that could give him radiused corners in drywall. So we produced panels which gave him a 4" inside radius, 8" outside radius, and a wrap-around curve for the end of a stud wall.

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Please declare your interest in the site linked to - otherwise your question will be deleted as spam. –  ChrisF Feb 3 '11 at 10:00
    
I tried cleaning up your post a little bit and making it clear that you have a direct affiliation with the website you linked to. You may want to include a ballpark cost estimate for a single corner on an 8' wall. This will give anyone looking into a curved drywall corner for their home an idea if your product is worth buying. If it's something like 10x the price of a sheet of drywall, I'm doubting you have much of a target audience here. –  Doresoom Feb 3 '11 at 21:46
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Seems like an apt recommendation given the question. –  zanlok Feb 4 '11 at 8:00
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